Question

two nicol prism are adjusted in crossed position .one of the nicol prism is then rotated through a 30 degree .calculate percentage of incident unpolarised light that will pass through the system of two nicol prism.

Answer 1

Answer:I

I  

2

​  

 

​  

=  

8

3

​  

=37.5 % (Rqed)

Explanation:The final arrangement of prism is as follows :-

transmitted intensity in I  

2

​  

.

unpolarized right of intensity I becomes half after crossing A

⇒I  

1

​  

=I/2

and as I  

1

​  

 passes B, it follows mauns law:-

I  

2

​  

=I  

1

​  

cos  

2

θ(θ=30  

∘

)

⇒I  

2

​  

=  

2

I

​  

cos  

2

(30  

∘

)=  

8

3I

​  

 

⇒  

I

I  

2

​  

 

​  

=  

8

3

​  

=37.5 % (Rqed)

solution